coreboot/src/soc
Subrata Banik c31c194228 soc/qualcomm/x1p42100: Increase SPI bus frequency to 75MHz
Boost the SPI bus clock frequency from 50MHz to 75MHz in the
bootblock early initialization.

This increase reduces the latency for loading subsequent stages
(romstage/ramstage) from the SPI flash. Since the QSPI core
can now be configured to 300MHz, this 75MHz bus speed
maintains a stable 1:4 integer divider ratio, ensuring optimal
signal integrity and timing margins for the flash interface.

BUG=b:478226455
TEST=Verified successful boot on Bluey. Observed a reduction (10ms)
in 'read SPI' duration in the console logs and confirmed that the
vboot hash verification passes consistently.

Change-Id: Idea0dbdd435cbbfe22a756d2b94b1cdfa3c70ffe
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90887
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Derek Huang <derekhuang@google.com>
2026-01-27 02:01:08 +00:00
..
amd Makefile.mk: Remove "crt0" dead code 2026-01-25 19:05:42 +00:00
cavium
example/min86
ibm/power9 soc/power9/rom_media.c: find CBFS in PNOR 2025-08-28 20:14:01 +00:00
intel soc/intel/{mtl,ptl}/fsp_params: Program PcieRpDetectTimeoutMs 2026-01-25 19:06:40 +00:00
mediatek soc/mediatek/common: Combine dsi_cmdq_size register writes 2026-01-25 19:06:22 +00:00
nvidia treewide: Move mipi_panel_parse_commands() to commonlib 2026-01-14 09:38:36 +00:00
qualcomm soc/qualcomm/x1p42100: Increase SPI bus frequency to 75MHz 2026-01-27 02:01:08 +00:00
rockchip treewide: Move mipi_panel_parse_commands() to commonlib 2026-01-14 09:38:36 +00:00
samsung
sifive
ti
ucb/riscv soc/riscv/ucb: Switch to FDT parsing to get memory size 2025-02-26 17:11:09 +00:00
xilinx